Phyla-Vell, created by Peter David and Paul Azaceta, is the least established member of the Guardians of the Galaxy having first appeared in Captain Marvel #16 in 2003. She is the artificially created offspring of Captain Mar-Vell, appearing after Genis-Vell (then, Captain Marvel) destroyed and recreated the universe. Both Genis-Vell and Phyla-Vell were created by their mother, Elysius.
She was primarily featured in the battles against Annihilus and the Phalanx in Annihilation and Annihilation: Conquest, respectively, though she did get her own mini-series, Annihilation: Conquest – Quasar, which focused on her struggle to follow in the footsteps of the former Quasar, as well as the rest of the Mar-Vell family.
Her superpowers include superhuman strength and flight. With the use of her Quantum Bands, she can fire and absorb energy blasts, as well as turn energy into solid energy forcefields and such, which allow her to travel through space.